آنتن تک‌قطبی جدید برای کاربردهای سیستم فراپهن باند با ویژگی حذف باند فرکانسی شبکه محلی بیسیم و ارزیابی با روش تصمیم‌گیری چندگانه
محورهای موضوعی : طراحی و کاربرد آنتن
1 - گروه برق- واحد نقده، دانشگاه آزاد اسلامی، نقده، ایران
2 - مرکز تحقیقات مایکروویو و آنتن- واحد ارومیه، دانشگاه آزاد اسلامی، ارومیه، ایران
کلید واژه: آنتن تک‌قطبی, روش تصمیم‌گیری چندگانه, سیستم فراپهن باند, شبکه محلی بیسیم, ویژگی حذف باند.,
چکیده مقاله :
در این مقاله یک طرح جدیدی از آنتن تک‌قطبی چاپی برای کاربردهای سیستم فراپهن باند (UWB) با ویژگی حذف باند ارائه می‌شود. عنصر تابشی آنتن پیشنهادی از یک پچ متعامد تشکیل شده که توسط یک خط تغذیه میکرونواری 50 اهم تغذیه می‌شود. همچنین این آنتن در ابعاد کوچک در سایز 12×20 میلی‌متر مربع ساخته شده که می‌تواند به راحتی در دستگاه‌های قابل حمل استفاده شود. پارامترها و عملکردهای این آنتن هم از طریق شبیه‌سازی‌ها و هم بعد از ساخت مورد تحلیل و بررسی قرار گرفته است. آنتن مطرح شده شامل پهنای باند گسترده‌ای از 81/2 تا 30/13 گیگاهرتز است که به طور کامل محدوده تعیین شده توسط کمیسیون ارتباطات فدرال (FCC) برای سیستم UWB از 1/3 تا 6/10 گیگاهرتز را پوشش می‌دهد. همچنین برای جلوگیری از تداخل سیستم‌های شبکه محلی بیسیم (WLAN) باند فرکانسی در محدوده (14/5 تا 23/6 گیگاهرتز) را حذف می‌کند. خواص تشعشعی آنتن پیشنهادی نیز در مقاله بررسی شده است. همچنین جهت مقایسه منصفانه با دیگر مقاله‌های ارائه شده در این زمینه از روش تصمیم‌گیری چندگانه (MCDM) استفاده شده است. علاوه بر این آنتن از مزایایی مانند سادگی ساخت، هزینه پایین، بهره بالا و نیز ویژگی‌های تابشی قابل قبول برخوردار است.
A compact printed monopole antenna for ultra-wide band (UWB) applications with band-notched characteristics is designed in this paper. The radiating element of the proposed antenna is composed of an orthogonal patch fed by a 50-ohm microstrip feedline. It has a very compact size of 20mm×12mm, which can be integrated easily with other RF front-end circuits. Also, this antenna is made in small and compact dimensions in the size of 12×20 mm square, which can be easily integrated with other circuits before and after it. The parameters and functions of this antenna have been analyzed and investigated both through simulations and after construction. It has been demonstrated that the proposed antenna provides an ultra-wide bandwidth from 2.81 GHz to 13.30 GHz, completely covering the range set by the federal communication commission (FCC) for UWB operations (3.1GHz to 10.6GHz) and a frequency band rejection (5.14-6.23 GHz) to eliminate wireless local area network (WLAN) systems interfering. The radiation properties of the proposed antenna are also investigated throughout the paper. Besides that, for a fair comparison with other published articles in this field, the multi-criteria decision making (MCDM) method has been used. It also has advantages such as low profile, low cost, high gain and satisfactory radiation characteristics.
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